The correct option is B (Meter)2
Option 1––––––––––: (Feet)3
This is the unit of volume because it has an exponent of 3 over feet.
Option 2––––––––––: (Meter)2
It is the unit of area because meter is unit of length and also it has an exponent 2 over it. So, it becomes unit of area.
Option 3––––––––––: (Ounce)2
Ounce is unit of weight so it cannot measure area.
Option 4––––––––––: (Gram)2
It is also the unit of weight so cannot contribute in finding area.